Finding the Fourth Proportional to 128,808.18, 193,212.27 and 40,067.28
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Solution
The fourth proportional to 128,808.18, 193,212.27 and 40,067.28 is: 60,100.92
Step by Step Solution
- Step 1: Write the proportion equation
128,808.18 : 193,212.27 = 40,067.28 : x - Step 2: Convert to fraction form
128,808.18/193,212.27 = 40,067.28/x - Step 3: Cross multiply
128,808.18x = 193,212.27 × 40,067.28 - Step 4: Simplify right side
128,808.18x = 7,741,490,121.53 - Step 5: Solve for x
x = 7,741,490,121.53/128,808.18 - Step 6: Final answer
x = 60,100.92
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.